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Finding the Fourth Proportional to 207,846.70, 312,000.45 and 129,049.90

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Solution

The fourth proportional to 207,846.70, 312,000.45 and 129,049.90 is: 193,717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,846.70 : 312,000.45 = 129,049.90 : x
  2. Step 2: Convert to fraction form
    207,846.70/312,000.45 = 129,049.90/x
  3. Step 3: Cross multiply
    207,846.70x = 312,000.45 × 129,049.90
  4. Step 4: Simplify right side
    207,846.70x = 40,263,626,872.46
  5. Step 5: Solve for x
    x = 40,263,626,872.46/207,846.70
  6. Step 6: Final answer
    x = 193,717.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.